Keep two empty lines between declarations for cpp files

src/scanner-character-streams.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 28 matching lines @@
 // BufferedUtf16CharacterStreams
 
 BufferedUtf16CharacterStream::BufferedUtf16CharacterStream()
     : Utf16CharacterStream(),
       pushback_limit_(NULL) {
   // Initialize buffer as being empty. First read will fill the buffer.
   buffer_cursor_ = buffer_;
   buffer_end_ = buffer_;
 }
 
+
 BufferedUtf16CharacterStream::~BufferedUtf16CharacterStream() { }
 
 void BufferedUtf16CharacterStream::PushBack(uc32 character) {
   if (character == kEndOfInput) {
     pos_--;
     return;
   }
   if (pushback_limit_ == NULL && buffer_cursor_ > buffer_) {
     // buffer_ is writable, buffer_cursor_ is const pointer.
     buffer_[--buffer_cursor_ - buffer_] = static_cast<uc16>(character);
@@ skipping 47 matching lines @@
 }
 
 
 unsigned BufferedUtf16CharacterStream::SlowSeekForward(unsigned delta) {
   // Leave pushback mode (i.e., ignore that there might be valid data
   // in the buffer before the pushback_limit_ point).
   pushback_limit_ = NULL;
   return BufferSeekForward(delta);
 }
 
+
 // ----------------------------------------------------------------------------
 // GenericStringUtf16CharacterStream
 
 
 GenericStringUtf16CharacterStream::GenericStringUtf16CharacterStream(
     Handle<String> data,
     unsigned start_position,
     unsigned end_position)
     : string_(data),
       length_(end_position) {
@@ skipping 188 matching lines @@
         int end_position)
     : Utf16CharacterStream(),
       source_(data),
       raw_data_(data->GetTwoByteData(start_position)) {
   buffer_cursor_ = raw_data_,
   buffer_end_ = raw_data_ + (end_position - start_position);
   pos_ = start_position;
 }
 
 } }  // namespace v8::internal